Kennebec River
The Forks · Upper Kennebec
Maine, USA
Open live forecast →Target species: Landlocked Salmon, Brook, and Brown.
Stream gauge: 01047150. Flow and water temperature update on every refresh.
Weekly AI Outlook as of 06/05/26
At 2670 cfs, the upper Kennebec is running full and clean — prime conditions for the season's best caddis action. Water temps in the mid-50s have triggered consistent evening emergences, with landlocked salmon and brook trout feeding aggressively in the big water. Cool nights ahead should extend the hatch window, but focus efforts on the final 2 hours before dark when the surface erupts. Swing soft hackles through the deeper runs, then switch to skating Elk Hair Caddis #14 when risers appear.
- Flow: 2670 cfs — full but fishable, perfect volume for swinging flies through deep runs and covering water effectively
- Hatches: Prime caddis emergence window with water temps crossing 55°F threshold — evenings will produce the best surface action
- Water Temp: Mid-50s range triggering consistent bug activity — ideal for both caddis and early sulphur emergence
- Best Window: Final 2 hours before dark when caddis emerge — start with soft hackles, switch to dry flies when fish show
Generated weekly from live USGS gauge readings, weather forecasts, and recent fly shop reports. Updates Friday mornings.
About this Water
- Tailwater
- Best months: Apr–Oct, peak May (Hendrickson) and June (Sulphur)
The Kennebec River from The Forks to Bingham — a tailwater reach below Wyman Dam — is one of New England's premier landlocked salmon and brook trout fisheries. Cold, consistent flows from the Wyman releases create classic tailwater conditions: dense Brachycentrus caddis hatches (Mother's Day Grannom in May), reliable Hendrickson emergences in spring afternoons, and June Sulphur fishing that demands precision in the long evening light. The Forks region offers a mix of float and wade access, with the river's character ranging from broad meadow runs to pocket water through the canyon section. Maine's longest-running stocked salmon fishery, with documented stockings dating back to the 1860s.
The Kennebec's landlocked salmon stocking program, documented from the 1860s, is one of the oldest continuously-running fisheries-management programs in the United States — a 160-year-old experiment that produced one of New England's most reliable trophy salmon fisheries.
January Outlook
January on the upper Kennebec is deep Maine winter. The river below Harris Dam remains open thanks to the tailwater release, but conditions are extreme. The Dam Pool to Beach Pool section stays open for fly-fishing-only, catch-and-release fishing year-round. Midge activity on warmer days.
Productive Patterns
- Zebra Midge #20
- Mercury Midge
- Griffith's Gnat
- Small Black Stonefly Nymph
Tips
Only the section from Harris Dam to the Beach Pool is open in winter — fly fishing only, catch and release. Midges are the only game in January. Fish the slow pools below the dam on mild afternoons when midge clusters bring the occasional landlocked salmon or brook trout to the surface.
Water Notes
Water 34–38°F. Tailwater keeps river open below dam. Extreme cold. Fly-fishing-only C&R section open.
February Outlook
February on the upper Kennebec is the coldest month. The Harris Dam tailwater section remains fishable for the dedicated winter angler. Midges are the primary food source. Deep snow and cold temperatures make access challenging.
Productive Patterns
- Zebra Midge #22
- Griffith's Gnat
- Mercury Midge
- RS2
Tips
February is for the truly dedicated. The tailwater below Harris Dam holds fish year-round, but access via Route 201 can be challenging in deep snow. Midday midge hatches on warm days are the only reliable opportunity. Dress in layers — it can be well below zero at The Forks.
Water Notes
Water 33–37°F. Deep Maine winter. Tailwater open. Access difficult. Midge-only activity.
March Outlook
March on the upper Kennebec brings the first hints of spring. Little Black Stoneflies begin emerging — one of the earliest hatches in Maine. Smelt start spilling through Harris Dam, drawing landlocked salmon and brook trout. The river is still cold but fish begin moving.
Productive Patterns
- Black Stonefly Nymph #14
- Zebra Midge
- Smelt Streamer
- Black Woolly Bugger
Tips
Little Black Stoneflies are one of the first hatches on the Kennebec, starting in early March. Smelt coming through Harris Dam trigger aggressive streamer feeding. Swing streamers through the pools below the dam — landlocked salmon hit hard when smelt are running.
Water Notes
Water 36–42°F. First stoneflies. Smelt running through dam. Fish becoming active.
April Outlook
April opens the general fishing season on the Kennebec (April 1). Blue Winged Olives begin — the main staple of the river. Snowmelt keeps flows high and water murky through much of the month. The gorge below The Forks is dramatic but access is limited during high water.
Productive Patterns
- BWO Parachute #18
- Pheasant Tail Nymph
- Smelt Streamer
- Black Stonefly Nymph
Tips
Season opens April 1 — one fish daily, 14-inch minimum for trout and salmon. BWOs start in April and are the river's most reliable hatch. Water clarity improves as the month progresses. The tailwater below Harris Dam fishes best when dam releases are moderate. Streamer fishing for smelt-feeding salmon is excellent.
Water Notes
Water 40–48°F. Season opens. BWOs beginning. High snowmelt flows early. Clearing by late April.
May Outlook
May is when the upper Kennebec comes alive. Quill Gordon and Hendrickson hatches begin in early May — the first major mayfly hatches of the season. Water clears by mid-May as snowmelt subsides. Landlocked salmon and brook trout feed actively on the emerging mayflies.
Productive Patterns
- Hendrickson Dry #14
- Quill Gordon #14
- BWO Parachute #18
- Pheasant Tail Nymph
Tips
Mid-May before the water clears is the traditional start of good fishing. Hendricksons emerge mid-afternoon when water temps hit the upper 40s. Quill Gordons prefer the faster riffles and pocket water. Both hatches overlap and the fish key on them heavily. The pools below Harris Dam concentrate rising fish.
Water Notes
Water 46–54°F. Clearing by mid-month. Hendrickson and Quill Gordon hatches. Prime early season.
June Outlook
June is the finest month on the upper Kennebec. Caddis hatches provide the most consistent surface action — evenings can be spectacular with the big water erupting with rising fish. March Browns, Little Yellow Stoneflies, and sporadic sulfurs add variety. Both landlocked salmon and brook trout feed aggressively.
Productive Patterns
- Elk Hair Caddis #14
- Soft Hackle Caddis
- March Brown #10
- Stimulator #10
Tips
June caddis hatches are the Kennebec's signature event. Swing a soft hackle caddis through the runs at dusk — a size 14 Elk Hair Caddis dead-drifted then skated can draw explosive strikes from landlocked salmon. March Browns start in early June. Little Yellow Stoneflies hatch from the fast runs.
Water Notes
Water 50–58°F. Peak hatch activity. Caddis, March Brown, stoneflies overlapping. Best month of the year.
July Outlook
July on the upper Kennebec benefits from the cold Harris Dam tailwater — water stays fishable when lower-elevation Maine rivers warm up. Evening caddis hatches continue. Sporadic sulfur hatches in late June and July produce nice fish. Terrestrial fishing begins.
Productive Patterns
- Elk Hair Caddis #16
- Sulphur Dun #16
- Hopper
- Stimulator #12
Tips
The Harris Dam tailwater keeps the upper Kennebec cold enough to fish through July when many Maine rivers become too warm. Late June and July sulfurs produce nice fish when timed right. Morning and evening fishing is most consistent. The gorge section holds brook trout that rarely see a fly.
Water Notes
Water 54–62°F. Tailwater keeps temps fishable. Evening caddis. Sulfurs sporadic. Terrestrials beginning.
August Outlook
August on the upper Kennebec is late-summer fishing sustained by the cold tailwater. While many Maine rivers are too warm for trout, the Kennebec below Harris Dam remains productive. Terrestrial patterns work well. Evening caddis hatches persist.
Productive Patterns
- Hopper #10
- Ant #16
- Beetle #14
- Elk Hair Caddis #16
Tips
August is where the Harris Dam tailwater earns its reputation — the upper Kennebec holds fish when other Maine rivers are too warm. Fish mornings and evenings. Hopper-dropper rigs through the runs are effective. The remote gorge section provides solitude and willing brook trout.
Water Notes
Water 56–64°F. Tailwater advantage — cooler than most Maine rivers. Terrestrials productive. Fish mornings and evenings.
September Outlook
September on the upper Kennebec is the start of fall fishing — BWOs return, temperatures cool, and the remote Maine wilderness begins showing fall color. Brook trout start staging for the spawn. Landlocked salmon become increasingly aggressive.
Productive Patterns
- BWO Parachute #18
- Elk Hair Caddis
- Streamer (dark)
- Soft Hackle
Tips
September is when the upper Kennebec transitions into fall. BWOs return in force on overcast afternoons. Brook trout begin staging for the October spawn — look for them in gravelly runs. Streamer fishing for aggressive pre-spawn landlocked salmon is excellent. The Maine woods begin their fall color show.
Water Notes
Water 52–58°F. Cooling temps. BWOs returning. Pre-spawn brookies and salmon. Fall color beginning.
October Outlook
October is catch-and-release month on the upper Kennebec. Landlocked salmon and brook trout drop out of Indian Pond and Moosehead Lake to spawn — concentrating fish in the runs and tail-outs. BWO and midge hatches continue. The Maine woods are at peak fall color.
Productive Patterns
- BWO Parachute #18
- Streamer (olive/black)
- Egg Pattern
- Zebra Midge
Tips
October is all catch-and-release — no harvest. Spawning fish concentrate in gravel runs and pool tails. The biggest brook trout and landlocked salmon of the year are often encountered in October. Respect spawning redds. The remote wilderness setting with peak Maine fall foliage is extraordinary.
Water Notes
Water 46–52°F. C&R only. Spawning activity. Peak fall color. Trophy fish present.
November Outlook
November on the upper Kennebec narrows to the Dam-to-Beach Pool section — fly-fishing-only, catch-and-release through winter. Post-spawn fish are recovering. Midge and BWO hatches on mild days. The Maine wilderness transitions to early winter.
Productive Patterns
- Zebra Midge #20
- BWO Nymph #18
- RS2
- Small Streamer
Tips
Only the Harris Dam to Beach Pool section remains open after November 1 — fly fishing only, catch and release. Post-spawn fish are recovering and will take midges and small nymphs on warmer days. Access becomes more challenging as snow arrives. A quiet, rewarding time on the river.
Water Notes
Water 40–48°F. Restricted section open. Post-spawn fish. Early winter conditions. Snow arriving.
December Outlook
December on the upper Kennebec is Maine winter. The Harris Dam tailwater section stays open and holds fish year-round. Midges are the only reliable hatch. The surrounding wilderness is deeply snowed in — Route 201 provides access but conditions are serious.
Productive Patterns
- Zebra Midge #22
- Griffith's Gnat
- Mercury Midge
- RS2
Tips
December fishing at The Forks is a true winter wilderness experience. The tailwater below Harris Dam holds landlocked salmon and brook trout year-round. Midday midge hatches on mild days are the only opportunity. The Forks area lodges make a winter fishing trip surprisingly comfortable.
Water Notes
Water 34–40°F. Deep winter. Tailwater open. Midge-only. Serious winter conditions.
Hatch Calendar
| Insect | Peak | Active | Size | Productive Patterns |
|---|---|---|---|---|
| Hendrickson Ephemerella subvaria |
May | Apr, May | #12–14 |
|
| Caddis Brachycentrus spp. |
May, Jun | May, Jun, Jul, Aug, Sep | #14–16 |
|
| Sulphur Ephemerella dorothea |
Jun | May, Jun, Jul | #16–18 |
|
| Blue Winged Olive Baetis spp. |
May, Oct | Apr, May, Sep, Oct, Nov | #18–20 |
|
Access & Approach
The Forks, ME is the primary base. Multiple boat launches between The Forks and Bingham. Solon-to-Bingham is a popular float. Maine fishing license required (general law applies; some sections have special regulations — check the Maine DIFW guide). Wyman Dam release schedule affects flow; check before fishing.
Nearby Fly Shops
- Maine Fly Guide
- Kennebec River Angler
Regulations & License
Fishing in Maine requires a current license. Always verify season dates, bag limits, and any special-regulation waters before you fish.
Maine fishing regulations & license →
Nearby Waters
Closest Waters
About Current
Kennebec River conditions on Current combine real-time flow data (USGS, WSC, CDEC, CEHQ), weather, tide predictions, hatch probabilities calibrated to this specific water, and recent fly shop reports from the area.
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